| Name | Meaning | Gender | Origin |
|---|
| Odeda | Encouraged | Female | Hebrew |
| Odette | Wealth | Female | Germanic |
| Ody | Wealthy Defender | Unisex | English |
| Olwen | White footprint | Female | Welsh |
| Opal | Jewel, gem | Female | Sanskrit |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Pahana | Anglo | Unisex | Native American |
| Paloma | Dove | Female | Spanish |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Panther | A black leopard | Unisex | English |
| Paper | | Unisex | Hebrew |
| Patches | | Unisex | Hebrew |
| Pax | Peace | Unisex | Latin |
| Pearl | Pearl | Female | English |
| Peek-a-boo | | Unisex | Hebrew |
| Peewee | | Unisex | Hebrew |
| Penelope | Weaver | Female | Greek |
| Penney | Duck | Female | Greek |
| Perla | Pearl | Female | Italian |
| Petunia | Type of flower | Female | English |
| Phantom | Something elusive. A ghost | Unisex | English |
| Pilar | Pillar | Female | Spanish |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pinstripe | | Unisex | Hebrew |
| Pirate | | Unisex | Hebrew |
| Pixel | | Unisex | Hebrew |
| Pluto | Wealth, riches | Unisex | Greek |
| Poco | Little. | Unisex | English |
| Pongo | One who smells. | Unisex | English |
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | English |